Received-SPF: pass (google.com: domain of linux-kernel+bounces-143250-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249;
Message-ID: <872e3687-8431-4456-9f87-13321c19ba17@intel.com>
Date: Fri, 12 Apr 2024 21:25:01 +0200
User-Agent: Mozilla Thunderbird
Subject: Re: [PATCH v2 0/2] Support clean reboot after hibernate on Arm64
To: David Woodhouse <dwmw2@infradead.org>, Will Deacon <will@kernel.org>
CC: Catalin Marinas <catalin.marinas@arm.com>, Robert Moore
	<robert.moore@intel.com>, Len Brown <lenb@kernel.org>, Sudeep Holla
	<sudeep.holla@arm.com>, <linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <linux-acpi@vger.kernel.org>,
	<acpica-devel@lists.linux.dev>, "Rafael J. Wysocki" <rafael@kernel.org>
References: <20240412073530.2222496-1-dwmw2@infradead.org>
 <20240412140515.GA28052@willie-the-truck>
 <1d7a7c6e73b4bf3f2177dca0e45d375e77e8388a.camel@infradead.org>
Content-Language: en-US
From: "Wysocki, Rafael J" <rafael.j.wysocki@intel.com>
In-Reply-To: <1d7a7c6e73b4bf3f2177dca0e45d375e77e8388a.camel@infradead.org>
Content-Type: text/plain; charset="UTF-8"; format=flowed
Content-Transfer-Encoding: 8bit
Precedence: bulk
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?L1o3Sm9qQVkzb0Fpc0pjajNRczRlZEwvZkJ1aWdmU3JxdmV6dFBVMDJlQmR1?=
 =?utf-8?B?MUwvNklyQXZaSDhMNlo3ZmVUSkI5azBtOFQwMW1qYk00amFwSWpvQkFkeDRt?=
 =?utf-8?B?a0J1OHVRdEVsMHFUc0xXVnZqalEwL09FMHlrMjRUQVdVYSs5MHRnM0dvQlJW?=
 =?utf-8?B?L01xNnVZdUdSSE9IQ29MazM0cGNOaHk1VFBVZHJrNXJyMjB2bkE1QkZBT3Ux?=
 =?utf-8?B?T0pZMXk5blRZVE9USUVGdkxjQlVmaFVnWEE4ZVRleXlOU2ROS21uRTBQLy9t?=
 =?utf-8?B?eVc1cUUyOW9wYytwOTZPS1ZXcVFIT2x2bnVRMkplNjFIWmoyUzFHZDlMcC9X?=
 =?utf-8?B?TGhaQmRRMndVMzNLQ05GVlZ3UDlmcjhSUnFBZmtpeHQrbEhtM01ZRFYzUjE1?=
 =?utf-8?B?OFhyc2hXUVI0blZnTXNBak83RTZJanBrTmtEeGpBUG03RTliRS9lVHRBeDlC?=
 =?utf-8?B?U2w2RUh6N3JQS1FYZFRManRwenYzK2QxcnNyNkVjVm9DQXgveCs2OXZMZjhM?=
 =?utf-8?B?eUMrMkMzL0RyVVgvT2czSHEzcnFLREZMYnU4b1ZnSjlDRU9XV2ljd2IrMlN6?=
 =?utf-8?B?Q0lRdlhpTUZ6SXpkVktjVmFJNUJucEs4UnNSajhKeDhwYWZ3eDlSMTJlcGEz?=
 =?utf-8?B?OUxuM21KSW5BVEtjZkJUMFRpTFN6TnUwUkltWXpBYUVYc08zSzBjUWM4NWdV?=
 =?utf-8?B?MnAwZVhkMG9MUE43NHZsajZFVFJrcTJIR09qeFJCUFBhZHlJalRQNUR1M00r?=
 =?utf-8?B?NFNpNHZOY3NtbmFTWVJVSlRKMnA2bm9BeHVjb0xDVkozY2lSKytPLzZpZkpO?=
 =?utf-8?B?NERrcVhwUlpFQTFJcDFFc1ZmTGpKUzV0S3Z6MDdVTHh2RkprL0NsdTJ1dGJB?=
 =?utf-8?B?cmsrKzlsd2pBbVFoWER3dXlOcUxUUFZRNGs0QjNKSURnS1Q1bUpCMnczNVgr?=
 =?utf-8?B?UFFiR2FSeWUrQysxSWJ1M21DYTZRa05YQ1Vnb0ZvUFNQcHZlcWFkd2ZncFdw?=
 =?utf-8?B?ZmE4ZWxEdDNNbm5yNHY2MUlHeVgydk1ITkpyR0hocEtwczRTZ1dsQXNiWG41?=
 =?utf-8?B?VVNhRHI2SHVldFd4ajd5WG04U0FERExiVjVOYlRDNWkxOUJZYVBXNnBqKzlz?=
 =?utf-8?B?TGk1Ky9BL3RuNXdOYkgwMWUrUEdSV2hEV0VXNERSK1ArRXdYeFIxRDJJRG1s?=
 =?utf-8?B?K2x4dHYvYXc1YnRaVVU3WTYzV1ZjVW43Y3dsNmlneGZjVnlpZnBSaWkyV2t1?=
 =?utf-8?B?Y3FyVVlBQ2gvaTJweDlncVV4cEhBYm04VlY4Ky96TjJqaVE0c1NFV1VONld0?=
 =?utf-8?B?cDRVeTQ1djBWeUlvMW5GT1l4REVuM1ZHbXd1UE91MGIrNlIxUGQzWUpXQTBH?=
 =?utf-8?B?a0pqTXE3cUxvQUFSVE9hcTVpUVlLQTQva1FMQWdYRStlcklHRWozUnpyM2Rn?=
 =?utf-8?B?ajc4Rm94VmxWOFhuRnJVMHVVd1NFS2pOL2pUSFYxTjNNN0dGSERLdVNacVli?=
 =?utf-8?B?T283OWVBa2JTU2I0V2NMdEp6TngyRnlEdDJXNVFWVWhGK1lCeFR5VmljZVJx?=
 =?utf-8?B?cUpFdFRub0VuUXhFUkhsVGRsNkIwY0lXRnJ3b3BFWGE1cGNkN0I3UzZIQ3Q4?=
 =?utf-8?B?S1Baak5NOER5Q2VYbGVyL3FZQjJMdUtvTFJaNUlzczMrZlFEYnRlSFgxS2JO?=
 =?utf-8?B?M1E5cGl2N3FDTkJIdDFjUmZkKzVld214bDV3TnhKdTFzaEs3Wm5QaDdRWVZY?=
 =?utf-8?B?TlROV3o3czFHcVZYYVVvWnlVayt2NnVCYXN3ZXNXUDIyRjk2UUhKcTRvT0JM?=
 =?utf-8?B?RTZxZ09mWFlleTFucHhoSTdFRnF1V05BeldYRkJsbVhuU21DbThLalMyYS9m?=
 =?utf-8?B?eURDSmxDS2d4S0JEbDFJR21QdGtSQ05sZUxyd21zb1ZOZjRzalBzKytsYVBq?=
 =?utf-8?B?WXgybEU4WHRBMGJoREFJY3lyditERFlkckt4dmZhZTh1bjhkL2NIeEM2Tzhs?=
 =?utf-8?B?dENmMGRxSGVwdGRyd2JOeWVQSFlvYUxLaTcyeHdESUU4UEduMlJLZHlabWlI?=
 =?utf-8?B?OWRvZ2ZaOFJhZUViaFZHdWJVYXhuMUoyM1dVSGl6aXd3NTJmRTZSbFI4b3Yv?=
 =?utf-8?B?aTdpaGRRd2ZoZTJJUlRiZ0FyUEdTVXFRQVRpV2RTR2pxalhvT0kwOHYxMEh0?=
 =?utf-8?B?UlE9PQ==?=
X-MS-Exchange-CrossTenant-Network-Message-Id: ea19e04c-2d7f-40db-fdc7-08dc5b264344
X-MS-Exchange-CrossTenant-AuthSource: MW5PR11MB5810.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Apr 2024 19:25:07.9075
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: j0GBl6SspR+jRDWY0MamXSKiv6JDEoEWGiurISpRs6Qvh3s644SSoJMl6KdEq1uohXHtigi8wuHReIvv3bvCpqkbaSoTHoefw2c5TaId8m8=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR11MB8134
X-OriginatorOrg: intel.com

On 4/12/2024 4:18 PM, David Woodhouse wrote:
> On Fri, 2024-04-12 at 15:05 +0100, Will Deacon wrote:
>> On Mon, Mar 11, 2024 at 12:19:14PM +0000, David Woodhouse wrote:
>>> When the hardware signature in the ACPI FACS changes, the OS is supposed
>>> to perform a clean reboot instead of attempting to resume on a changed
>>> platform.
>>>
>>> Although these patches have a functional dependency, they could be merged
>>> separately. The second patch just won't *see* a FACS table if the ACPICA
>>> fix isn't present.
>>>
>>> v2: Now that the ACPICA patch is merged upstream, note its commit ID
>>>
>>> David Woodhouse (2):
>>>        ACPICA: Detect FACS even for hardware reduced platforms
>>>        arm64: acpi: Honour firmware_signature field of FACS, if it exists
>>>
>>>   arch/arm64/kernel/acpi.c      | 10 ++++++++++
>>>   drivers/acpi/acpica/tbfadt.c  | 30 +++++++++++++-----------------
>>>   drivers/acpi/acpica/tbutils.c |  7 +------
>> Rafael, how would you like the handle this series? The arm64 part has
>> been Acked-by Sudeep, so I'm happy with it.
> Thanks, Will.
>
> Similar question for Rafael on the guest side of the PSCI SYSTEM_OFF2
> series, in particular
> https://lore.kernel.org/kvm/20240319130957.1050637-6-dwmw2@infradead.org/#Z31kernel:power:hibernate.c
> which sets the entering_platform_hibernation flag around the call to
> the standard kernel_power_off() function when invoking it for
> HIBERNATION_SHUTDOWN.

In both cases, please feel free to route the patches as it is convenient 
and add

Acked-by: Rafael J. Wysocki <rafael@kernel.org>

to both of them.